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Finding the Fourth Proportional to 684,633.39, 944,721.39 and 378,661.15

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Solution

The fourth proportional to 684,633.39, 944,721.39 and 378,661.15 is: 522,512.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,633.39 : 944,721.39 = 378,661.15 : x
  2. Step 2: Convert to fraction form
    684,633.39/944,721.39 = 378,661.15/x
  3. Step 3: Cross multiply
    684,633.39x = 944,721.39 × 378,661.15
  4. Step 4: Simplify right side
    684,633.39x = 357,729,287,967.00
  5. Step 5: Solve for x
    x = 357,729,287,967.00/684,633.39
  6. Step 6: Final answer
    x = 522,512.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.